Ten to twenty percent of your REG score hinges on rules many candidates treat as an afterthought. Most people cram the high-level concepts of Circular 230 but fail to connect them to the specific, dollar-driven penalty calculations and standards of authority the exam actually tests, leaving critical points on the table.
The Ethics, Professional Responsibilities, and Federal Tax Procedures section of the CPA REG exam tests your judgment on practitioner standards under Circular 230, AICPA Statements on Standards for Tax Services (SSTS), and federal tax law. It covers preparer penalties, client record management, and standards for tax advice.
Key facts
- Governing Document
- Treasury Department Circular 230
- Blueprint Area
- REG Area V
- Blueprint Weighting
- 10-20% of the REG exam
- Key IRC Sections
- §6694 (Preparer Penalties), §6695 (Other Preparer Penalties), §6701 (Aiding and Abetting)
- Official Body
- AICPA and the Internal Revenue Service
- Exam Format
- Tested via Multiple-Choice Questions (MCQs) and Task-Based Simulations (TBS)
What is Ethics, Professional Responsibilities, and Federal Tax Procedures and why it matters for the CPA exam
This topic covers the enforceable rules and standards you are legally and ethically bound to follow when preparing tax returns or representing clients before the IRS. The AICPA includes this not because it is a formality, but because these rules carry real-world consequences, including fines and the loss of your license.
This content appears in Area V of the AICPA's official blueprints. The AICPA reports that Area V, "Ethics, Professional Responsibilities, and Federal Tax Procedures," accounts for 10-20% of the REG section (AICPA). That portion is large enough to be the deciding factor between a 74 and a 75.
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Questions will come in the form of both MCQs and Task-Based Simulations. They test your ability to apply judgment, not just recall a rule. You'll be given a scenario and asked to identify the violation, calculate the penalty, or determine the appropriate action a preparer should take. Try VoraPrep's free CPA practice questions to see how these scenarios are structured.
The most common mistake candidates make is underestimating this section. They focus all their energy on complex basis calculations and assume ethics is just "common sense." But the exam tests specific thresholds and legal standards defined in Treasury Circular 230 and the Internal Revenue Code. "Common sense" will not help you calculate a failure-to-file penalty or determine if a tax position has "substantial authority."
Key concepts and rules you must know
To pass REG, you need to master the specific, testable rules governing tax practice. These are not suggestions; they are the enforceable standards of the profession.
Treasury Circular 230
Circular 230 is the primary document governing practice before the IRS. It outlines who may practice (CPAs, attorneys, Enrolled Agents), defines the duties and restrictions on practitioners, and details the sanctions for violations. You must know the rules regarding conflicts of interest, advertising, fees, and standards for written tax advice.A key testable area is a practitioner's obligation regarding client information. You have a duty of confidentiality but also a duty to the tax system. If you discover an error on a client's prior return, Circular 230 requires you to promptly inform the client of the error and its potential consequences. It does not require you to inform the IRS without the client's permission.
Tax Preparer Penalties (IRC §6694 & §6695)
The exam heavily tests the penalties assessed directly against tax return preparers. These are distinct from the penalties assessed against taxpayers, which are covered in our CPA Regulation: Taxpayer penalties — Complete Study Guide.The core preparer penalty is for taking an unreasonable position on a return. The penalty is the greater of $1,000 or 50% of the income derived by the preparer for the return. If the understatement was due to willful or reckless conduct, the penalty increases to the greater of $5,000 or 75% of the income.
Other penalties under §6695 include:
- Failure to furnish a copy of the return to the taxpayer.
- Failure to sign the return.
- Failure to furnish your identifying number (PTIN).
- Failure to be diligent in determining eligibility for certain tax credits, like the Earned Income Tax Credit.
The Hierarchy of Tax Position Standards
This is where candidates lose the most points. The exam requires you to know the precise standard of support needed for a tax position to avoid penalties. Memorize this hierarchy.| Standard | Definition | When it Applies |
|---|---|---|
| More Likely Than Not | >50% chance of the position being upheld on its merits. | Required for tax shelters and reportable transactions. The highest standard. |
| Substantial Authority | ~40% chance of success. Based on primary sources like the IRC, regulations, and court cases. | The general standard for an undisclosed position on a tax return to avoid penalties. |
| Reasonable Basis | >20% chance of success. A position that is arguable but fairly unlikely to prevail. | The minimum standard for a disclosed position on a tax return to avoid penalties. |
| Not Frivolous | A position that is not patently improper but has a very low chance of success. | Below the standard needed to avoid penalties, even with disclosure. A losing position. |
The decision tree is simple: Is it a tax shelter? You need a "more likely than not" standard. Is it a normal position? If you disclose it on Form 8275, you need "reasonable basis." If you don't disclose it, you need "substantial authority."
Due Diligence
A preparer must exercise due diligence in preparing returns and making representations to the IRS. This means you can generally rely in good faith on information furnished by the client. However, you cannot ignore the implications of information you know. If the client's information appears to be incorrect, incomplete, or inconsistent, you must make reasonable inquiries. You are not an auditor, but you cannot be willfully blind.Check Your State’s Exact CPA Exam Requirements
Every state has different credit hour, ethics, and residency rules. Use our 55-jurisdiction checker to verify your eligibility before applying.
Worked example with step-by-step solution
Let's apply these concepts to a realistic exam scenario. This is how the exam tests your judgment, not just your memory.
What is the potential penalty assessed against Maria under IRC §6694?
This question combines multiple concepts: the standard of support, preparer penalties, and professional responsibility.
Step 1: Identify the standard of support for the position.
The position is a deduction on a corporate tax return. It is not identified as a tax shelter. Because Maria did not disclose the position on a form like Form 8275, the required standard to avoid penalties is substantial authority (a ~40% chance of success).Step 2: Evaluate the actual support for the position.
Maria's research concluded there was a 15% chance of success. This falls far short of the "substantial authority" standard. In fact, it doesn't even meet the lower "reasonable basis" standard (~20%). A position with only a 15% chance of success is likely considered frivolous.Step 3: Determine if the preparer's conduct was willful or reckless.
Tom explicitly told Maria to take a deduction she knew was improper. By knowingly including a deduction with no realistic possibility of being sustained, Maria's conduct goes beyond a simple mistake. It constitutes willful or reckless conduct because she ignored facts that called the deduction's legitimacy into question.Step 4: Calculate the appropriate penalty.
Because the understatement was due to willful or reckless conduct, the higher penalty under IRC §6694(b) applies. The penalty is the greater of:- $5,000
- 75% of the income derived by the preparer.
The income Maria derived was $8,000. 75% * $8,000 = $6,000.
The greater of $5,000 and $6,000 is $6,000.
Practice questions: test yourself on Ethics, Professional Responsibilities, and Federal Tax Procedures
The only way to master this material is through adaptive, question-first practice. Reading about the rules is not enough. You must apply them under exam conditions. VoraPrep's adaptive learning engine has over 9,500 questions, with hundreds targeting these ethics and procedure rules. For unbeatable value, you can get started for just $29/month.
Here are a few examples modeled after real exam questions.
Sample Q1: Zenith Corp. filed its 2025 tax return on April 15, 2026, reporting $2,200,000 of gross income. During a 2028 audit, the IRS discovered that Zenith had failed to report $800,000 of cash income. What is the statute of limitations for the IRS to assess additional tax?Explanation: The general statute of limitations is 3 years. However, it extends to 6 years if the taxpayer omits an amount of gross income that is in excess of 25% of the gross income reported on the return. Here, Zenith omitted $800,000, which is more than 25% of the $2,200,000 reported ($2,200,000 * 0.25 = $550,000). Therefore, the 6-year statute applies. The correct answer is C.Sample Q2: Mr. Chen timely filed his individual income tax return on April 15 but was unable to pay the $10,000 tax liability shown. He paid the full amount 45 days late. Ignoring interest, what is the failure-to-pay penalty?
Explanation: The failure-to-pay penalty is 0.5% per month or part of a month the tax is unpaid. The maximum penalty is 25% of the unpaid tax. Mr. Chen was 45 days late, which is considered two months (part of the first month and part of the second month). The penalty is calculated as: $10,000 0.5% 2 months = $100. The correct answer is C.Sample Q3: On what date does the standard 3-year statute of limitations for assessment begin for a federal income tax return that was filed on March 1, 2026, for the 2025 calendar year?
Explanation: For a return filed early, the statute of limitations begins on the due date of the return, not the filing date. The due date for a 2025 calendar-year return is April 15, 2026. Therefore, the 3-year clock starts on April 15, 2026. The correct answer is D.
To build the judgment needed for these questions, you need repetition and detailed feedback. The VoraPrep platform provides instant explanations for every question, and you can always ask Vory, your 24/7 AI tutor, for clarification.
Study tips and exam-day strategy
Success in this area comes from targeted study, not just sheer hours.
First, focus on the decision trees. For any scenario, ask:
- Who is the actor (preparer or taxpayer)?
- What is the potential violation (e.g., unreasonable position, failure to file, conflict of interest)?
- What is the specific standard or threshold (e.g., substantial authority, 25% income omission)?
- What is the consequence (e.g., penalty calculation, required action)?
This structured approach prevents you from getting lost in the details.
On exam day, read the ethics questions carefully. The examiners use specific words like "knowingly," "disclosed," and "willfully" as signals. These words are clues that tell you which rule and which penalty tier to apply. Do not skim the prompt.
In your final week of review, do not re-read Circular 230. Instead, work through 20-30 MCQs on this topic each day. Active recall is far more effective than passive reading. Focus on understanding why the wrong answers are wrong. This is the fastest way to solidify your knowledge and prepare for the nuanced scenarios you'll face.